Ok Guys i just talked to a guy at thumper racing to ask him about my plug problems. What he said was: 1. Our bikes only rev to 8500RPM and the YZ Revs to 11,000. 2. That the reason my plug is so black and sootyafter a few rides is because of the yz timing. 3. He also told me that the needle needed to go from the 3rd clip to the 2nd. I think that is what he said to try first. how much truth is there to this. I have ever taken the carb off before. So i am a bit scared. With the main and piolet jets if i just un screw them will they come out. I want to make sure they are clean. Also is the needle easy to move. Guys i need help here. I am half tempted to go back to wr timing and get rid of this problem. So if you all can help me i would appreciate it.